Questions & Answers for: Chevrolet Silverado 1500 fuel trim

fuel trim is high at low speed and load, look for a vacuum leak. If fuel trim is high at high speed and loads, look for fuel volumn problem or restriction. If fuel trim is high at all speeds and loads

...will be completely black, the p0134, 134 and 1133 are all for that O2 sensor, the P0171 is for lean fuel trim on bank 1, and the p0300 is for a misfire probably caused by the lean fuel

...issue before smog? this code is for the air system on bank 2. The code is set when it does not have the correct fuel trim as read by the 02 sensors. The prolem may be air pump or 02 sensor

1999 5.3 liter idles ok. runs very rough. dino showed bank 1 too lean and a mifire sounds like a bad cat to me (catallac converter). Check your fuel trims on bank 1 vs. bank 2

2002 avalanche po171-po174 code 171 is posting right fuel trim is lean 174 is posting left fuel trim is lean can be faulty injectors not opening all the way it seems

...Fuel Trim Bank Two Condition - The ECM has detected a rich or lean air/fuel ratio condition on engine bank two Probable Cause[s] If bank one and two are set together suspect a fuel pressure condition ...

...gas in my oil Check fuel trim & diagnose the cause of a rich condition or leaking fuel injectors Have to change oil & filter once resolved Be careful you don't hydraulic the motor & ruin ...

...fuel trim is too lean on bank one and the computer can not make it go to rich. The computer controls the on time for the injectors to adjust the fuel mixture. The problem could be one of the O2 ...

...need reseal the intake on best scenario you have a vacuum leak affecting bank one double chek your fuel trims short term if adding fuel 2 digits look for vacuum leak if none foun unplug your uuper

engine sputters going up hill Check for codes,cylinder misfires & fuel trim